Also in the trailer, Caitlyn pops champers with her transgender friends, gets teary about her kids and shares one hell of a cute moment with her 88-year-old mum Esther. She's now officially our favourite celebrity mum.

Caitlyn published a blog on Tuesday morning to thank fans for their support and stand up for the transgender community.

"I feel such a responsibility to this courageous group to try to get it right and tell all sides of the story," the former Olympian wrote. "To me, that's always the biggest question: am I doing it right?"

I Am Cait premieres on Monday, July 27 at 9.30pm in Australia and 11.30pm in New Zealand on E!

Caitlyn Jenner's New York style: She changes outfits five times in 24 hours!